02-14-2008
Here's an example of dumping the symbols from an object file (hello world in foo.c -> foo.o):
me@mine:~$ objdump -t foo.o
foo.o: file format elf32-i386
SYMBOL TABLE:
00000000 l df *ABS* 00000000 foo.c
00000000 l d .text 00000000 .text
00000000 l d .data 00000000 .data
00000000 l d .bss 00000000 .bss
00000000 l d .rodata 00000000 .rodata
00000000 l d .note.GNU-stack 00000000 .note.GNU-stack
00000000 l d .comment 00000000 .comment
00000000 g F .text 00000026 main
00000000 *UND* 00000000 puts
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UTF8(5) BSD File Formats Manual UTF8(5)
NAME
utf8 -- UTF-8, a transformation format of ISO 10646
SYNOPSIS
ENCODING "UTF-8"
DESCRIPTION
The UTF-8 encoding represents UCS-4 characters as a sequence of octets, using between 1 and 6 for each character. It is backwards compatible
with ASCII, so 0x00-0x7f refer to the ASCII character set. The multibyte encoding of non-ASCII characters consist entirely of bytes whose
high order bit is set. The actual encoding is represented by the following table:
[0x00000000 - 0x0000007f] [00000000.0bbbbbbb] -> 0bbbbbbb
[0x00000080 - 0x000007ff] [00000bbb.bbbbbbbb] -> 110bbbbb, 10bbbbbb
[0x00000800 - 0x0000ffff] [bbbbbbbb.bbbbbbbb] ->
1110bbbb, 10bbbbbb, 10bbbbbb
[0x00010000 - 0x001fffff] [00000000.000bbbbb.bbbbbbbb.bbbbbbbb] ->
11110bbb, 10bbbbbb, 10bbbbbb, 10bbbbbb
[0x00200000 - 0x03ffffff] [000000bb.bbbbbbbb.bbbbbbbb.bbbbbbbb] ->
111110bb, 10bbbbbb, 10bbbbbb, 10bbbbbb, 10bbbbbb
[0x04000000 - 0x7fffffff] [0bbbbbbb.bbbbbbbb.bbbbbbbb.bbbbbbbb] ->
1111110b, 10bbbbbb, 10bbbbbb, 10bbbbbb, 10bbbbbb, 10bbbbbb
If more than a single representation of a value exists (for example, 0x00; 0xC0 0x80; 0xE0 0x80 0x80) the shortest representation is always
used. Longer ones are detected as an error as they pose a potential security risk, and destroy the 1:1 character:octet sequence mapping.
SEE ALSO
euc(5)
Rob Pike and Ken Thompson, "Hello World", Proceedings of the Winter 1993 USENIX Technical Conference, USENIX Association, January 1993.
F. Yergeau, UTF-8, a transformation format of ISO 10646, January 1998, RFC 2279.
The Unicode Standard, Version 3.0, The Unicode Consortium, 2000, as amended by the Unicode Standard Annex #27: Unicode 3.1 and by the Unicode
Standard Annex #28: Unicode 3.2.
STANDARDS
The utf8 encoding is compatible with RFC 2279 and Unicode 3.2.
BSD
April 7, 2004 BSD